江西科学2026，Vol.44Issue(1)：10-18,9.DOI:10.13990/j.issn1001-3679.2026.01.002
顾及剩余地形模型的区域似大地水准面精化
Refinement of Regional Quasi-geoid with Residual Terrain Model
摘要
Abstract
To construct a regional high-precision quasi-geoid,this study addresses the in-sufficient spatial resolution of existing gravity field models by compensating for truncation errors using the Residual Terrain Model(RTM).Based on GNSS/leveling data from two distinct test areas,the applicability of high-order gravity field models such as EGM2008 was evaluated,and residual height anomaly fitting models were developed using polynomial surface fitting,multi-surface functions,and BP neural networks.The results indicate that the EGM2008 model performs better in plain areas,whereas the SGG-UGM-2 model yields superior accuracy in mountainous regions.After RTM correction,the average fitting accuracy of height anomalies improved by 11.85%and 8.12%in the two regions,respec-tively.Among the tested methods,the multi-surface function approach achieved the high-est accuracy,with computed precisions of 1.67 and 3.67 cm for the respective regions.These findings demonstrate that incorporating RTM correction effectively enhances the re-finement of regional quasi-geoid models.关键词
似大地水准面/重力场模型/剩余地形模型/高程异常/拟合模型Key words
quasi-geoid/gravity field model/residual terrain model/height anomaly/fitting models分类
天文与地球科学引用本文复制引用
丁永哲,王建强..顾及剩余地形模型的区域似大地水准面精化[J].江西科学,2026,44(1):10-18,9.基金项目
国家自然科学基金项目(42264002). （42264002）
